数字增益自动补偿微波辐射计计算机仿真分析

Simulation Analysis of the Digital Auto-Gain Compensative Microwave Radiometer

:数字增益自动补偿微波辐射计是一种新型的微波辐射计 ,有效地补偿了微波辐射计系统增益的波动 ,提高了系统的稳定性。按照目标微波辐射能量在系统中传递的物理过程 ,利用物理与数学相结合的方法建立了数字增益自动补偿微波辐射计的计算机仿真模型。应用已测得的系统参数 (噪声系数、增益 ) ,对系统性能进行了仿真分析 ,取得了与实际系统特性较好的一致性。同时 。

The digital auto-gain compensative microwave radiometer is a new type of microwave radiometer. The system gain fluctuation and effective system noise fluctuation can be efficiently eliminated using the detectable variation when the standard signal pass through the system , and the long term stability is optimal. This paper built the computer simulative model of the digital auto-gain compensative microwave radiometer according to the property of the target's microwave radiant energy passing through the system, and the combination method of mathematics and physics is used . In this paper the simulative analytical results correspond with the analytical results in theory and operating results of actual radiometer system. Also, some main problems when we developed the multi-frequency space borne microwave radiometer can be explained.